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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and thermal degradation of poly(n-butylisocyanate) modified by 1,3-propanesultone
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Synthesis and thermal degradation of poly(n-butylisocyanate) modified by 1,3-propanesultone

机译：1,3-丙磺酸内酯改性聚异丁酸正丁酯的合成及热降解

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Poly(n-butylisocyanates) were synthesized by anionic homopolymerization with the addition of sulfonate groups in the termination stage. Two types of functional polymers were obtained from different quantities of added 1,3-propanesultone (PrS). When a stoichiometric proportion of sultone is added, the reaction with poly(n-butylisocyanate) renders a mix of a nonfunctionalized (PBIC) and a telechelic polymer (PBICT). In the presence of an excess of PrS, the proportion of end-functionalized chains was higher, and a significant change in their thermal properties was observed. Polymers were characterized by FTIR and NMR, and measurements of intrinsic viscosity were made. Thermal degradation of the polymers was studied under nitrogen atmosphere for various heating rates. The kinetic parameters such as the activation energy and the reaction order were determined by using Ozawa's method. Thermal degradation analyses showed that the degradation processes depend strongly on the concentration of functional groups. (C) 2003 Wiley Periodicals, Inc. [References: 27]
机译：聚（正丁基异氰酸酯）是通过阴离子均聚并在终止阶段添加磺酸盐基团合成的。从不同数量的1,3-丙磺酸内酯（PrS）获得了两种类型的功能聚合物。当加入化学计量比例的磺内酯时，与聚（异丁酸正丁酯）的反应会产生非官能化（PBIC）和远螯聚合物（PBICT）的混合物。在过量的PrS存在下，末端官能化链的比例更高，并且观察到它们的热性质有显着变化。通过FTIR和NMR对聚合物进行表征，并进行特性粘度的测量。在氮气气氛下以各种加热速率研究了聚合物的热降解。动力学参数如活化能和反应顺序通过小泽法测定。热降解分析表明，降解过程在很大程度上取决于官能团的浓度。 （C）2003 Wiley Periodicals，Inc. [参考：27]

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